Preservationists use devices like the WonderDumper (open-source hardware) to read cartridge ROM chips and save RAM. These dumps are verified against checksums from projects like No-Intro and Redump , which catalog clean, unmodified ROMs. The result is a verifiable digital copy, identical to the original.

The Wonderswan (original, Color, SwanCrystal) used no backlight, achieving 40+ hours on a single AA battery. Its 16-bit CPU and sprite capabilities were modest, but the rotating control scheme allowed vertical shooters (e.g., Judgement Silversword ) and visual novels (e.g., Kaze no Klonoa: Moonlight Museum ) to shine.

Nintendo, Sony, and Sega have all created virtual console services; Bandai Namco has not. The Wonderswan is legally orphaned — no company currently sells its software. Under the Copyright Term Extension Act , these games remain protected until ~2095, yet no rights holder offers access. ROM archives fill this vacuum.